Method of driving a display panel and display apparatus for performing the same

ABSTRACT

A method of driving a display panel includes outputting a data voltage of three-dimensional (“3D”) image data included in a left-eye data frame and a right-eye data frame to the display panel along a scanning direction of a first direction during a first period, blocking the data voltage from being provided to the display panel during a second period and outputting a black data voltage to the display panel during a third period that is less than the first period.

PRIORITY STATEMENT

This application is a continuation application of co-pending U.S.application Ser. No. 13/611,197 filed Sep. 12, 2012, which claimspriority under 35 U.S.C. §119 to Korean Patent Application No.10-2011-0099515, filed on Sep. 30, 2011, in the Korean IntellectualProperty Office (KIPO), the disclosures of which are each incorporatedby reference in their entireties.

1. TECHNICAL FIELD

Exemplary embodiments of the present invention relate to a method ofdriving a display panel and a display apparatus for performing the same.More particularly, exemplary embodiments of the present invention relateto a method of driving a display panel, which may increase a luminanceof a three-dimensional (“3D”) image and a display apparatus forperforming the same.

2. DISCUSSION OF RELATED ART

A liquid crystal display (“LCD”) can be used to display a 3D image usingthe principle of binocular parallax. For example, since our eyes arespaced apart from each other, images viewed at different angles may beperceived by an observer as a stereoscopic image. A display apparatusthat enables stereoscopic images to be displayed may be referred to as astereoscopic image display apparatus.

A stereoscopic image display apparatus may be classified into astereoscopic type with an extra spectacle and an auto-stereoscopic typewithout the extra spectacle. The stereoscopic type includes a passivepolarized glasses method with a polarized filter having a differentpolarized axis according to each eye, and an active shutter glassesmethod. In the active shutter glasses method, a left-eye frame image anda right-eye frame image are time-divided to be periodically displayed,and a pair of glasses is used to view the displayed images. The glassesinclude a left-eye shutter and a right-eye shutter, which aresequentially opened or closed in synchronization with the periods.

The polarized glasses method uses the polarized filter to divide the 3Dimage into a left-eye frame image and a right-eye frame image, which maycause a luminance of the 3D image to be decreased. In addition, in theshutter glasses method, a liquid crystal (“LC”) response time may havean affect on a crosstalk between the left-eye frame image and theright-eye frame. However, it can be difficult to improve the LC responsetime. A backlight unit may be driven with a global blinking method toimprove crosstalk between the left-eye frame image and the right-eyeframe. However, the global blinking method may decrease the luminance ofthe 3D image.

SUMMARY

At least one exemplary embodiment of the present invention provides amethod of driving a display panel to increase a luminance of a 3D image.

At least one exemplary embodiment of the present invention provides adisplay apparatus for performing the method of driving the displaypanel.

According to an exemplary embodiment of the invention, a method ofdriving a display panel includes outputting a data voltage ofthree-dimensional (“3D”) image data included in a left-eye data frameand a right-eye data frame to the display panel along a scanningdirection of a first direction during a first period, blocking the datavoltage from being provided to the display panel during a second period,and outputting a black data voltage to the display panel during a thirdperiod less than the first period.

In an exemplary embodiment, the data voltage of the 3D image data ismaintained during a holding period before which the black data voltageis output to the display panel, and the holding period is graduallydecreased along the scanning direction.

In an exemplary embodiment, the method further includes providing alight to the display panel during an image period during which an imagecorresponding to the 3D image data is displayed on the display panel andblocking the light from the display panel during a block period duringwhich a black image corresponding to the black data voltage is displayedon the display panel, wherein the image period includes the holdingperiod.

In an exemplary embodiment, a period during which the black data voltageis provided to the display panel is gradually increased along thescanning direction.

In an exemplary embodiment, the method further includes correcting the3D image data using a plurality of look-up tables (“LUTs”) and each LUTis preset respectively corresponding to one of a plurality of distinctregions of the display panel arranged along the scanning direction.

In an exemplary embodiment, the method further includes outputting thedata voltage of the 3D image data to the display panel along thescanning direction of a second direction opposite to the first directionduring a fourth period, blocking the data voltage from being provided tothe display panel during a fifth period and outputting the black datavoltage to the display panel during a sixth period less than the fourthperiod.

In an exemplary embodiment, outputting the data voltage of the 3D imagedata includes sequentially outputting a gate signal having a first pulseto a plurality of gate lines included in the display panel along thescanning direction.

In an exemplary embodiment, outputting the black data voltage to thedisplay panel includes sequentially outputting a gate signal having asecond pulse of a width less than or equal to that of the first pulse tothe gate lines along the scanning direction.

In an exemplary embodiment, outputting the black data voltage to thedisplay panel includes outputting a gate signal having a third pulse tothe gate lines at the same time.

According to an exemplary embodiment of the invention, a method ofdriving a display panel includes outputting a data voltage of a firstleft-eye data frame or a first right-eye data frame to the display panelduring a first period, sequentially outputting a gate signal having afirst pulse to a plurality of gate lines included in the display panel,blocking the data voltage from being output to the display panel duringa second period, outputting a data voltage of a second left-eye dataframe or a second right-eye data frame that repeats the first left-eyedata frame or the first right-eye data frame to the display panel duringa third period less than the first period, and sequentially outputting agate signal having a second pulse to the gate lines.

According to an exemplary embodiment of the invention, a displayapparatus includes a display panel and a data driving part. The datadriving part outputs a data voltage of three-dimensional (3D) image dataincluded in a left-eye data frame and a right-eye data frame to thedisplay panel along a scanning direction of a first direction during afirst period, blocks the data voltage from being provided to the displaypanel during a second period, and outputs a black data voltage to thedisplay panel during a third period less than the first period.

In an exemplary embodiment, the data voltage of the 3D image data ismaintained during a holding period before which the black data voltageis output to the display panel, and the holding period may be graduallydecreased along the scanning direction.

In an exemplary embodiment, the display apparatus further includes alight source part providing a light to the display panel during an imageperiod in which an image corresponding to the 3D image data is displayedon the display panel, and blocking the light from the display panelduring a block period in which a black image corresponding to the blackdata voltage is displayed on the display panel, wherein the image periodincludes the holding period.

In an exemplary embodiment, the display apparatus further includes adata correcting part correcting the 3D image data using a plurality oflook-up tables (“LUTs”) preset corresponding to one of a plurality ofdistinct regions of the display panel and arranged along the scanningdirection.

In an exemplary embodiment, the data driving part outputs the datavoltage of the 3D image data to the display panel along the scanningdirection of a second direction opposite to the first direction during afourth period, blocks the data voltage from being provided to thedisplay panel during a fifth period, and outputs the black data voltageto the display panel during a sixth period less than the fourth period.

In an exemplary embodiment, the display apparatus further includes agate driving part sequentially outputting a gate signal having a firstpulse to a plurality of gate lines included in the display panel alongthe scanning direction during the first period.

In an exemplary embodiment, the gate driving part sequentially outputs agate signal having a second pulse of a width less than or equal to thatof the first pulse to the gate lines along the scanning direction duringthe third period.

In an exemplary embodiment, the gate driving part outputs a gate signalhaving a third pulse to the gate lines at the same time during the thirdperiod.

According to an exemplary embodiment of the invention, a displayapparatus includes a display panel. The display panel displays one of aleft-eye frame image, a right-eye frame image and a refresh frame image(e.g., on an entire area). Left-eye frame image data corresponding tothe left-eye frame image or right-eye frame image data corresponding tothe right-eye frame image are provided to the display panel during afirst period, and refresh frame image data corresponding to the refreshframe image are provided to the display panel during a second periodless than the first period.

In an exemplary embodiment, the display apparatus further includes aglasses part including a left-eye part transmitting the left-eye frameimage and blocking the right-eye frame image, and a right-eye parttransmitting the right-eye frame image and blocking the left-eye frameimage.

In an exemplary embodiment, the refresh frame image data is black frameimage data corresponding to a black frame image.

In an exemplary embodiment, the black frame image data is provided to aplurality of horizontal lines of the display panel at the same time.

In an exemplary embodiment, the refresh frame image data issubstantially the same as the left-eye frame image data provided to thedisplay panel just before which the refresh frame image data is providedto the display panel, or a second left-eye frame image data which isgenerated using the left-eye frame image data provided to the displaypanel just before which the refresh frame image data is provided to thedisplay panel.

In an exemplary embodiment, the refresh frame image data issubstantially the same as the right-eye frame image data provided to thedisplay panel just before which the refresh frame image data is providedto the display panel, or a second right-eye frame image data which isgenerated using the right-eye frame image data provided to the displaypanel just before which the refresh frame image data is provided to thedisplay panel.

In an exemplary embodiment, first 3D image data including the left-eyeframe image data and the right-eye frame image data is provided to thedisplay panel in a first scanning direction and second 3D image dataincluding the left-eye frame image data and the right-eye frame imagedata is provided to the display panel in a second other scanningdirection.

In an exemplary embodiment, the display apparatus furthers include apolarization panel that is configured to change the left-eye frame imageand the right-eye frame image displayed on the display panel intopolarization lights different from each other.

In an exemplary embodiment, the display apparatus further includes adata correcting part configured to correct the 3D image data using aplurality of look-up tables (“LUTs”) preset corresponding to one of aplurality of distinct regions of the display panel arranged along thescanning direction.

In an exemplary embodiment, each of the LUTs generates correction datausing image data of frames adjacent each other.

According to at least one embodiment of the present invention, a datavoltage is not provided to a display panel during a predetermined periodand the data voltage provided previously is maintained, so that theluminance of the 3D image may be increased. In addition, the black frameimage is inserted between the left-eye frame image and the right-eyeframe image, so that the crosstalk of the 3D image may be reduced orprevented.

According to an exemplary embodiment of the invention, a displayapparatus for displaying three-dimensional images includes a displaypanel and a timing control part. The display panel includes a pluralityof pixels, gates lines, and data lines. The timing control part isconfigured to sequentially apply a data voltage of a left-eye image tothe data lines during a first period, block application of a datavoltage to the data lines during a second period, apply a black voltageof a black image to the data lines during a third period, and apply adata voltage of a right-eye image to the data lines. The timing controlpart adjusts a width of the third period in which the black voltage isapplied to each subsequent row of the pixels to be larger than orsmaller than a width of the third period in which the black voltage isapplied to a prior one of the rows.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more apparent by describing exemplaryembodiments thereof with reference to the accompanying drawings, inwhich:

FIG. 1 is a block diagram illustrating a display apparatus according toan exemplary embodiment of the present invention;

FIG. 2 is a waveform diagram illustrating a method of driving a displaypanel of FIG. 1 according to an exemplary embodiment of the presentinvention;

FIG. 3 is a conceptual diagram illustrating a method of driving adisplay panel of FIG. 1 according to an exemplary embodiment of thepresent invention;

FIG. 4 is a block diagram illustrating a data correcting part of FIG. 1according to an exemplary embodiment of the present invention;

FIGS. 5A and 5B are timing diagrams illustrating a method of driving agate driving part of FIG. 1 according to an exemplary embodiment of thepresent invention;

FIG. 6 is a timing diagram illustrating a method of driving a gatedriving part according to an exemplary embodiment of the presentinvention;

FIG. 7 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention;

FIG. 8 is a waveform diagram illustrating a method of driving thedisplay panel of FIG. 7 according to an exemplary embodiment of thepresent invention;

FIG. 9 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention;

FIG. 10 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention;

FIG. 11 is a waveform diagram illustrating a method of driving thedisplay panel of FIG. 10 according to an exemplary embodiment of thepresent invention;

FIG. 12 is a waveform diagram illustrating a method of driving a displaypanel according to an exemplary embodiment of the present invention; and

FIG. 13 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention.

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments of the present invention will beexplained in detail with reference to the accompanying drawings.However, the present invention may be embodied in various different waysand should not be construed as limited to the exemplary embodimentsdescribed herein.

As used herein, the singular forms, “a,” “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise.

FIG. 1 is a block diagram illustrating a display apparatus according toan exemplary embodiment of the present invention.

Referring to FIG. 1, the display apparatus includes a three-dimensional(“3D”) processing part 100, a timing control part 200, a repeating part300, a display panel 400, a panel driving part 500, a light source part600, a light source driving part 700 and a glasses part 800.

In an embodiment, the 3D processing part 100 processes received sourcedata by a frame unit into 3D image data in a 3D image mode. For example,3D image data in a frame unit could correspond to the data required todisplay an image using all pixels of the display panel 400 during agiven period. In an embodiment, the 3D processing part 100 divides thesource data frame into a left-eye data and a right-eye data. In anembodiment, the 3D processing part 100 respectively scales the left-eyeand right-eye data into left-eye and right-eye data frames correspondingto a resolution of the display panel 400. For example, if the 3Dprocessing part receives the left-eye and right-eye frames in aresolution that is incompatible with the resolution of the display panel400, it can convert the left-eye and right-eye frames into convertedleft-eye and right-eye frames that are compatible with the currentresolution of the display panel 400. The 3D processing part 100sequentially outputs the left-eye data frame and the right-eye dataframe.

The timing control part 200 generates a timing control signal to drivethe display apparatus, and controls the repeating part 300, the paneldriving part 500 and the light source driving part 700. In anembodiment, the timing control part 200 also controls the 3D processingpart 100. For example, in an embodiment, the 3D processing part 100receives the resolution from the timing control part 200. The 3Dprocessing part 100 may include a comparator for comparing theresolution of the display panel 400 with the resolution of theresolution of the received image data to determine whether conversion ofthe image data is needed.

The timing control part 200 includes a data correcting part 210. In anembodiment, the data correcting part 210 corrects the 3D image datausing a plurality of look-up tables (“LUTs”) preset corresponding to aplurality of space areas which is included in the display panel 400 andarranged along a scanning direction. For example, distinct consecutivesets of rows of pixels of the display panel 400 (e.g., space areas) maycorrespond to distinct regions, which can be driven according to achosen scanning direction. For example, if three regions are present, ascan in a forward scanning direction could correspond to sequentialactivation of the gate lines for the first, second, and third regions,while a scan in the reverse scanning direction could correspond tosequential activation of the gate lines of the third, second, and firstregions.

For example, the data correcting part 210 corrects the left-eye dataframe or the right-eye data frame presently received, based on theright-eye data frame or the left-eye data frame previously received.According to an exemplary embodiment, the data correcting part 210includes the LUTs storing correction data respectively corresponding tothe space areas (e.g., the distinct regions). A method of correcting thedata using the data correcting part 210 according to an exemplaryembodiment of the invention will be explained referring to FIG. 4.

The repeating part 300 repeats (e.g., duplicates) the 3D image datareceived by the frame unit from the timing control part 200 at least onetime, based on a driving frequency of the display panel 500. Forexample, when the driving frequency of the display panel 500 is about240 Hz, the repeating part 200 repeats the left-eye data frame or theright-eye data frame one time. For example, when the driving frequencyof the display panel 500 is about 360 Hz, the repeating part 200 repeatsthe left-eye data frame or the right-eye data frame twice. However, theabove-provided driving frequencies are merely examples, as the drivingfrequencies used to repeat a certain number of left-eye or right dataframes may vary in alternate embodiments. In an embodiment, therepeating part 300 sequentially outputs at least two left-eye dataframes and at least two right-eye data frames. In an exemplaryembodiment, the repeating part 300 is omitted and no repetition of theleft-eye and right-eye data frames occurs.

The display panel 400 includes first to n-th data lines DL1, . . . ,DLn, first to m-th gate lines GL1, . . . , GLm, and a plurality ofpixels P. The first to n-th data lines DL1, . . . , DLn are extendedalong a column direction and arranged along a row direction. The firstto m-th gate lines GL1, . . . , GLm are extended along the row directionand arranged along the column direction. In an embodiment, each pixel Pincludes a switching element TR connected to a gate line GL1 and a dataline DL1, a liquid crystal capacitor CLC connected to the switchingelement TR and a storage capacitor CST.

In an embodiment, the panel driving part 500 sequentially displays atleast one left-eye frame image, at least one refresh frame image, atleast one right-eye frame image and at least one refresh frame image onthe display panel 400, using the data frames received from the repeatingpart 300. When the repeating part 300 is omitted, the data driving part510 receives the left-eye and right-eye data frames directly from thetiming control part 200. The panel driving part 500 includes a datadriving part 510 and a gate driving part 530. Hereinafter, the refreshframe image may be referred to as a black frame image.

The data driving part 510 outputs a data voltage of the left-eye dataframe to the display panel 400 during a first period, blocks the datavoltage from being provided to the display panel 400 during a secondperiod, and outputs a black data voltage to the display panel 400 duringa third period under a control of the timing control part 200. In anembodiment, the first period is substantially the same as a sum of thesecond period and the third period. The data driving part 510 outputs adata voltage of the right-eye data frame to the display panel 400 duringa fourth period, blocks the data voltage from being provided to thedisplay panel 400 during a fifth period, and outputs the black datavoltage to the display panel 400 during a sixth period under the controlof the timing control part 200. In an embodiment, the fourth period issubstantially the same as a sum of the fifth period and the sixthperiod.

In an embodiment, the gate driving part 530 sequentially outputs firstto m-th gate signals to first to m-th gate lines of the display panel400 at a first frequency during the first period, blocks the gatesignals from being output to the gate lines during the second period,and sequentially outputs first to m-th gate signals to first to m-thgate lines of the display panel 400 at a second frequency higher thanthe first frequency during the third period under the control of thetiming control part 200.

For example, the gate driving part 530 sequentially outputs first tom-th gate signals having a first pulse of a first horizontal period H1during the first period, outputs the gate signals having a deactivatedlevel (e.g., a low level) during the second period, and sequentiallyoutputs first to m-th gate signals having a second pulse of a secondhorizontal period H2 that is less than the first horizontal period H1during the third period. In addition, the gate driving part 510sequentially outputs first to m-th gate signals having the first pulseof the first horizontal period H1 during the fourth period, outputs thegate signals having the deactivated level (e.g., a low level) during thefifth period, and sequentially outputs first to m-th gate signals havingthe second pulse of the second horizontal period H2 that is less thanthe first horizontal period H1 during the sixth period.

The light source part 600 provides a light to the display panel 400. Thelight source part 600 may be configured as a direct-illumination type oran edge-illumination type. The light source part 600 of theedge-illumination type includes a light guide plate (LGP) disposed underthe display panel 400 and at least one light source disposed at an edgeportion of the LGP. The light source part 600 of the direct-illuminationtype includes at least one light source directly disposed under thedisplay panel 400, and omits the LGP. Examples of the light sourceinclude a light emitting diode.

The light source driving part 700 drives the light source part 600according to the control of the timing control part 200. In anembodiment, the light source driving part 700 drives the light sourcepart 600 using a global blinking method. For example, the light sourcepart 600 provides light to the display panel 400 during a period inwhich the left-eye frame image or the right-eye frame imagecorresponding to the left-eye data frame or the right-eye data frame isdisplayed on the display panel 400, and blocks the light from thedisplay panel 400 during a period in which the black frame imagecorresponding to the black data voltage is displayed on the displaypanel 400.

The glasses part 800 includes a left-eye part 810 and a right-eye part820. The glasses part 800 may use an active shutter glasses mode or apassive polarization glasses mode. The left-eye part 810 transmits theleft-eye frame image and blocks the right-eye frame image. The right-eyepart 820 transmits the right-eye frame image and blocks the left-eyeframe image.

When the glasses part 800 uses the passive polarization glasses mode,the display apparatus may further include a polarization panel 900disposed on the display panel 400. The polarization panel 900 changesthe left-eye frame image and the right-eye frame image displayed on thedisplay panel 400 into polarized lights different from each other. Thus,the left-eye part 810 and the right-eye part 820 of the glasses part 800may selectively transmit the polarized left-eye frame image and theright-eye frame image.

FIG. 2 is a waveform diagram illustrating a method of driving a displaypanel of FIG. 1 according to an exemplary embodiment of the invention.

Referring to FIGS. 1 and 2, the panel driving part 500 drives thedisplay panel 400 based on the timing control signal of a verticalstarting signal STV, a gate clock signal CPV and a data enable signalDE, etc, generated from the timing part 200. Hereinafter, the drivingfrequency of the display panel 400 may be assumed to be about 240 Hz,the left-eye data frame may be assumed to be white grayscale data andthe right-eye data frame may be assumed to be black grayscale data.However, embodiments of the invention are not limited to any particulardriving frequency.

The data driving part 510 outputs the data voltage to the display panel400 based on the data enable signal DE. The data enable signal DE isactivated during the first period T1, is inactivated during the secondperiod T2, and is activated during the third period T3. The data enablesignal DE is activated during the fourth period T4, is inactivatedduring the fifth period T5, and is activated during the sixth period T6.

Based on the data enable signal DE, the data driving part 510 outputsthe data voltage of the left-eye data frame L to the display panel 400during the first period T1, blocks the data voltage from being output tothe display panel 400 during the second period T2, and outputs the blackdata voltage B to the display panel 400 during the third period T3. Thedata driving part 510 outputs the data voltage of the right-eye dataframe R to the display panel 400 during the fourth period T4, blocks thedata voltage from being output to the display panel 400 during the fifthperiod T5, and outputs the black data voltage B to the display panel 400during the sixth period T6.

In an embodiment, the gate driving part 530 generates gate signals foroutput to the display panel 400 based on the vertical starting signalSTV and the gate clock signal CPV. The vertical starting signal STVcontrols the start of driving the gate driving part 530. Thus, thevertical starting signal STV has a pulse at a beginning of each of thefirst period T1, the third period T3, the fourth period T4, the sixthperiod T6, etc., during which the data enable signal DE is activated. Inan embodiment, the gate clock signal CPV controls a pulse width of eachof the first to m-th gate signals. Thus, the gate clock signal CPV has afirst horizontal period during the first and fourth periods T1 and T4during which the data voltage of the left-eye data frame L or theright-eye data frame R is output to the display panel 400. The gateclock signal CPV has a second horizontal period different from the firsthorizontal period during the third and sixth periods T3 and T6 duringwhich the black data voltage B is output to the display panel 400.

Based on the vertical starting signal STV and the gate clock signal CPV,the gate driving part 530 sequentially outputs the first to m-th gatesignals having a first pulse corresponding to the first horizontalperiod to display panel 400 during the first period T1. During thesecond period T2, the gate driving part 530 blocks the first to m-thgate signals from being output to the display panel 400, or outputs thefirst to m-th gate signals having a low level. During the third periodT3, the gate driving part 530 sequentially outputs the first to m-thgate signals having a second pulse corresponding to the secondhorizontal period that is less than the first horizontal period.

During the fourth period T4, the gate driving part 530 sequentiallyoutputs the first to m-th gate signals having the first pulsecorresponding to the first horizontal period to display panel 400.During the fifth period T5, the gate driving part 530 blocks the firstto m-th gate signals from being output to the display panel 400, oroutputs the first to m-th gate signals having the low level. During thesixth period T6, the gate driving part 530 sequentially outputs thefirst to m-th gate signals having the second pulse corresponding to thesecond horizontal period that is less than the first horizontal period.

In an embodiment, the first period T1 is greater than the third periodT3 and is equal to a sum of the second period T2 and the third periodT3, and the second period T2 is equal to the third period T3. In anembodiment, the fourth period T4 is greater than the sixth period T6 andis a sum of the fifth period T5 and the sixth period T6, and the fifthperiod T5 is equal to the sixth period T6.

According to the control of the timing control part 200, the lightsource driving part 700 generates a light source driving signal LDS. Inan embodiment, the light source driving signal LDS has a high levelduring an image period ON during which the light is generated and a lowlevel during a black period OFF during which the light is blocked. Inaddition, the timing part 200 may generate a left-eye control signal LCSand a right-eye control signal RCS. In an embodiment, the left-eyecontrol signal LCS has a high level during a period in which the displaypanel 400 displays the left-eye frame image and the light source part600 emits the light. In the embodiment, the right-eye control signal RCShas a high level during a period in which the display panel 400 displaysthe right-eye frame image and the light source part 600 emits the light.

When the glasses part 800 uses the active shutter glasses mode, theleft-eye control signal LCS controls a shutter of the left-eye part 810and the right-eye control signal RCS controls a shutter of the right-eyepart 820. Thus, the left-eye part 810 transmits the left-eye frame imageand blocks the right-eye frame image, and the right-eye part 820transmits the right-eye frame image and blocks the left-eye frame image.

Alternatively, when the glasses part 800 uses the passive polarizationglasses mode, the left-eye control signal LCS and the right-eye controlsignal RCS control the polarization panel 900. The polarization panel900 is disposed on the display panel 400. The polarization panel 900changes the left-eye frame image displayed on the display panel 400 intoa first polarized light and changes the right-eye frame image displayedon the display panel 400 into a second polarized light. The left-eyecontrol signal LCS controls the polarization panel 900 to change theleft-eye frame image into the first polarized light, and the right-eyecontrol signal RCS controls the polarization panel 900 to change theright-eye frame image into the second polarized light. Thus, theleft-eye part 810 of the glasses part 800 transmits the first polarizedleft-eye frame image and blocks the second polarized right-eye frameimage. The right-eye part 820 of the glasses part 800 transmits thesecond polarized right-eye frame image and blocks the first polarizedleft-eye frame image. The display panel 400 may be divided into first,second, third, fourth, fifth, sixth, seventh and eighth display blocks,and the first, second, third, fourth, fifth, sixth, seventh and eighthdisplay blocks may have first, second, third, fourth, fifth, sixth,seventh and eighth driving waveforms D_DB1, D_DB2, D_DB3, D_DB4, D_DB5,D_DB6, D_DB7 and D_DB8 based on a liquid crystal response time of thedisplay panel 400. In an embodiment, the display blocks correspond toconsecutive horizontal rows of the display panel 400.

According to the first to eighth driving waveforms D_DB1 to D_DB8, theimage period ON of the light source driving signal LDS is a periodduring which the display panel 400 displays the left-eye frame image orthe right-eye frame image, and the black period OFF of the light sourcedriving signal LDS is a period during which the display panel 400displays the black frame image.

Referring to the first to eighth driving waveforms D_DB1, D_DB2, D_DB3,D_DB4, D_DB5, D_DB6, D_DB7 and D_DB8, the data voltage of the left-eyedata frame is sequentially provided to the first to eighth displayblocks. Timings at which the data voltage of the left-eye data frame isprovided to the first to eighth display blocks, may be arranged along afirst slope line TL1 having a first slope angle.

During the second period T2, the data driving part 510 does not providethe data voltage to the first to eighth display blocks of the displaypanel 400. For example, gate signals applied to gate lines of thedisplay panel 400 may be deactivated during the second period T2 toprevent application of the data voltage to the data lines. Thus, thefirst to eighth display blocks maintain the data voltage of the left-eyedata frame L provided during the first period T1. As shown in FIG. 2,the first to eighth display blocks have first to eighth holding periodsh1, h2, . . . , h8 which are gradually decreased along the scanningdirection of the forward direction.

During the third period T3, the black data voltage is sequentiallyprovided to the first to eighth display blocks. Timings at which theblack data voltage B is provided to the first to eighth display blocks,may be arranged along a second slope line TL2 having a second slopeangle different from the first slope angle.

For example, the first holding period h1 may be substantially the sameas the second period T2, the second holding period h2 may be less thanthe first holding period h1, the third holding period h3 may be lessthan the second holding period h2, the fourth holding period h4 may beless than the third holding period h3, the fifth holding period h5 maybe less than the fourth holding period h4, the sixth holding period h6may be less than the fifth holding period h5, the seventh holding periodh7 may be the sixth holding period h6, and the eighth holding period h8may be less than the seventh holding period h7.

The first to eighth holding periods h1, h2, . . . , h8 may be includedwithin the image period ON of the light source driving signal LDS.

According to a driving method C_TL in which the black data voltage isprovided to the display panel 400 during the second period T2, the upperarea UA of the display panel receives the black data voltage by the LCresponse time while the lower area LA of the display panel 400 receivesthe data voltage of the left-eye data frame. During the image period ONof the light source driving signal LDS, the lower area LA receives thedata voltage of the left-eye data frame and the upper area UA receivesthe black data voltage. Thus, a luminance of the upper area UA may beless than that of the lower area LA.

However, according to the an exemplary embodiment, the holding periodsh1, h2, . . . , h8 during which the data voltage of the left-eye dataframe L is maintained, are included in the image period ON. The holdingperiods h1, h2, . . . , h8 are gradually decreased from the upper areaUA toward the lower area LA. Thus, the luminance of the upper area UAmay be increased. Therefore, the luminance of the left-eye frame imagecorresponding to the left-eye data frame L may be increased.

In addition, during the fourth period T4, the data voltage of theright-eye data frame is sequentially provided to the first to eighthdisplay blocks. Timings at which the data voltage of the right-eye dataframe R is provided to the first to eighth display blocks, may bearranged along a third slope line TL3 having the first slope angle.

During the fifth period T5, the data driving part 510 does not providethe data voltage to the first to eighth display blocks. Thus, the firstto eighth display blocks maintain the data voltage of the right-eye dataframe provided during the fourth period T4. As shown in FIG. 2, thefirst to eighth display blocks have first to eighth holding periods h1,h2, . . . , h8 which are gradually decreased along the scanningdirection of the forward direction.

During the sixth period T6, the black data voltage is sequentiallyprovided to the first to eighth display blocks. Timings at which theblack data voltage B is provided to the first to eighth display blocks,may be arranged along a fourth slope line TL4 having the second slopeangle.

The first to eighth holding periods h1, h2, . . . , h8 may be includedwithin the image period ON of the light source driving signal LDS.

The holding periods h1, h2, . . . , h8 during which the data voltage ofthe right-eye data frame R is maintained may be included within theimage period ON. Therefore, the luminance of the right-eye frame imagecorresponding to the right-eye data frame R may be increased.

According to an exemplary embodiment of the invention, the data voltageis not provided to the display panel during a predetermined period andthe data voltage provided previously is maintained, so that theluminance of the 3D image may be increased. In addition, the black frameimage is inserted between the left-eye frame image and the right-eyeframe image, so that the crosstalk of the 3D image may be reduced orprevented.

However, according to the second slope line TL2 corresponding to thetimings at which the black data voltage is provided to the display panel400 and the third slope line TL3 corresponding to the timings at whichthe data voltage of the right-eye data frame is provided to the displaypanel 400, a period during which the black data voltage is provided tothe display panel 400 is gradually increased from the first displayblock to the eighth display block along the forward direction.Therefore, the display panel 400 displays a black image which graduallybecomes darker along the scanning direction of the forward direction.

The gradually changing black image has black-grayscale differencesbetween the upper area UA, middle area MA and the lower area LA of thedisplay panel 400. Thus, the gradually changing black image is insertedbetween the left-eye frame image and the right-eye frame image, so thatthe left-eye frame image and the right-eye frame image may havegrayscale differences between the upper area UA, middle area MA and thelower area LA.

According to an exemplary embodiment, the timing control part 200includes the data correcting part 210 correcting grayscale differencesbetween the upper area UA, middle area MA and the lower area LA includedin the left-eye and right-eye frame images.

FIG. 3 is a conceptual diagram illustrating a method of driving adisplay panel of FIG. 1 according to an exemplary embodiment of theinvention.

Referring to FIG. 3, a left-eye period or a right-eye period duringwhich the data voltage of the left-eye data frame L or the right-eyedata frame R is provided to the display panel 400 may be different froma black period during which the black data voltage B is provided to thedisplay panel 400. The left-eye period or the right-eye period may belonger than the black period. In addition, the data voltage of theleft-eye data frame L, the black data voltage B, the data voltage of theright-eye data frame R and the black data voltage B are sequentiallyprovided to the display panel 400, so that shapes of holding periodsduring which the data voltages L, B, R and B are maintained in thedisplay panel 400 may be the same as shown in FIG. 3.

Referring to FIG. 3, each of holding periods corresponding to the datavoltages of the left-eye and right-eye data frames L and R may begradually decreased from the upper area of the display panel 400 towardthe lower area of the display panel 400. Referring to the holdingperiods corresponding to the data voltages of the left-eye and right-eyedata frames L and R of FIG. 3, a holding period corresponding to a firsthorizontal line 1st LINE of the display panel 400 may be longest and aholding period corresponding to a last horizontal line M-th LINE of thedisplay panel 400 may be shortest.

A holding period corresponding to the black data voltage B may begradually increased from the upper area of the display panel 400 towardthe lower area of the display panel 400. Referring to the holding periodcorresponding to the black data voltage B of FIG. 3, a holding periodcorresponding to a first horizontal line 1st LINE of the display panel400 may be the shortest and a holding period corresponding to a lasthorizontal line M-th LINE of the display panel 400 may be the longest.

FIG. 4 is a block diagram illustrating a data correcting part of FIG. 1according to an exemplary embodiment of the invention.

Referring to FIGS. 2 and 4, the timing control part 200 includes a datacorrecting part 210. The data correcting part 210 includes a correctioncontrol part 211, a memory 212 and a correcting part 213.

The correction control part 211 determines the space area (e.g., region)of the display panel 400 included in the pixel corresponding to theimage data GK received presently. The correction control part 211controls the correcting part 213 based on the determined space area ofthe image data GK.

The memory 212 stores the present image data GK received presently undera control of the correction control part 211. The previous image dataGK−1 received previously corresponding to the present image data GK isreadout from the memory 212 and provided to the correcting part 213under a control of the correction control part 211.

The correcting part 213 stores correction data for correctingblack-grayscale differences of the image data respectively correspondingto the space areas. The space areas may be divided along the scanningdirection of the display panel 400. For example, a space area maycorrespond to a certain consecutive set of pixel rows of the displaypanel 400.

For example, the correcting part 213 includes a first LUT LUT1 storingfirst correction data corresponding to the upper area UA, a second LUTLUT2 storing second correction data corresponding to the middle area MA,and a third LUT LUT3 storing third correction data corresponding to thelower area LA. The divided space areas are not limited into the upper,middle and lower areas, and may be variously preset.

The black frame image inserted between the left-eye frame image and theright-eye frame image is the gradually changing black frame imageincluding black grayscales which are gradually increased from the upperarea UA toward the lower area LA.

For example, a black image displayed on the upper area UA may be assumedto be a 30-grayscale, a black image displayed on the middle area MA maybe assumed to be a 20-grayscale and a black image displayed on the lowerarea LA may be assumed to be a 10-grayscale. The first LUT LUT1 storesthe correction data corresponding to the present image data based on theblack image data of the 30-grayscale inserted between the previous imagedata received previously and the present image data received presently.The second LUT LUT2 stores the correction data corresponding to thepresent image data based on the black image data of the 20-grayscaleinserted between the previous image data received previously and thepresent image data received presently. The third LUT LUT3 stores thecorrection data corresponding to the present image data based on theblack image data of the 10-grayscale inserted between the previous imagedata received previously and the present image data received presently.

For example, when the present image data Gk is image data of a200-grayscale and the previous image data Gk−1 is image data of the200-grayscale, the present image 1.5 data may be corrected into thecorrection data G′k of a 210-grayscale based on the inserted black imagedata of the 30-grayscale in the upper area UA, the present image datamay be corrected into the correction data GI of a 220-grayscale based onthe inserted black image data of the 20-grayscale less than the30-grayscale in the middle area MA and the present image data may becorrected into the correction data G′k of a 230-grayscale based on theinserted black image data of the 10-grayscale less than the 20-grayscalein the lower area LA. The image data of the lower area LA displaying theblack image of a lower grayscale may be overdriven with respect to theimage data of the upper area UA displaying the black image of a highergrayscale.

As described above, the data correcting part 210 may correct thegrayscale difference between the left-eye frame image and right-eyeframe image due to the inserted gradually changing black image.

FIGS. 5A and 5B are timing diagrams illustrating a method of driving agate driving part of FIG. 1 according to an exemplary embodiment of theinvention.

FIG. 5A is a waveform diagram illustrating input and output signals ofthe gate driving part 530 shown in FIG. 1 during the first period T1 orthe fourth period T4.

Referring to FIGS. 2 and 5A, the timing control part 200 generates afirst gate clock signal CPV1 and a second gate signal CPV2 having thefirst horizontal period H1 during the first period T1 or the fourthperiod T4. The first gate clock signal CPV1 may be different from thesecond gate clock signal CPV2 and may have a delay difference withrespect to the second gate clock signal CPV2.

In an embodiment, the gate driving part 530 outputs the odd-numberedgate signals G1, G3, . . . based on the first gate clock signal CPV1,and outputs the even-numbered gate signals G2, G4 . . . , Gm based onthe second gate clock signal CPV2.

Each of the first to m-th gate signals G1, G2, . . . , Gm has a firstpulse PW1 corresponding to the first horizontal period H1.

FIG. 5B is a waveform diagram illustrating input and output signals ofthe gate driving part 530 shown in FIG. 1 during the third period T3 orthe sixth period T6.

Referring to FIGS. 2 and 5B, the timing control part 200 generates afirst gate clock signal CPV1 and a second gate signal CPV2 having asecond horizontal period H2 that is less than the first horizontalperiod H1 during the third period T3 or the sixth period T6. The firstgate clock signal CPV1 may be different from the second gate clocksignal CPV2 and may have a delay difference with respect to the secondgate clock signal CPV2.

In an embodiment, the gate driving part 530 outputs the odd-numberedgate signals G1, G3, . . . , based on the first gate clock signal CPV1,and outputs the even-numbered gate signals G2, G4, . . . , based on thesecond gate clock signal CPV2.

Each of the first to m-th gate signals G1, G2, . . . , Gm has a secondpulse PW2 corresponding to the second horizontal period H2 and is lessthan the first pulse PW1.

Referring to FIGS. 5A and 5B, the gate driving part 530 outputs thefirst to m-th gate signals G1, G2, . . . , Gm having the first pulse PW1and corresponding to the first horizontal period H1 during the first orfourth period T1 or T4 during which the data voltage of the left-eyedata frame or the right-eye data frame is provided to the display panel400.

The gate driving part 530 outputs the first to m-th gate signals G1, G2,. . . , Gm having the second pulse PW2 less than the first pulse PW1 andcorresponding to the second horizontal period H2 less than the firsthorizontal period H1 during the third period or the sixth period T3 orT6 during which the black data voltage of the black data frame isprovided to the display panel 400.

Therefore, during the third or sixth period T3 or T6 less than the firstperiod or the fourth period T1 or T4, the black data voltage may beprovided to the display panel 400.

According to an exemplary embodiment of the invention, a period duringwhich the black data voltage is provided to the display panel may bedecreased by about ½, ⅓, ¼, etc. with respect to a period during whichthe data voltage of the left-eye data frame or the right-eye data frameis provided to the display panel.

FIG. 6 is a timing diagram illustrating a method of driving a gatedriving part according to an exemplary embodiment of the presentinvention.

FIG. 6 is a timing diagram illustrating input and output of the gatedriving part 530 during the third period or the sixth period T3 or T6during which the black data voltage is provided to the display panel400.

According to an exemplary embodiment of the invention, the gate drivingpart 530 sequentially outputs first to m-th gate signals G1, G2, . . . ,Gm corresponding to the third horizontal period H3 and having the thirdpulse PW3 using the first gate clock signal CPV1 and the second gatesignal CPV2 having the third horizontal period H3 during the firstperiod or the fourth period T1 or T4 during which the data voltage ofthe left-eye data frame or the right-eye data frame is provided to thedisplay panel 400. The first gate clock signal CPV1 may be differentfrom the second gate clock signal CPV2 and may have a delay differencewith respect to the second gate clock signal CPV2. The third pulse PW3may be equal to or less than the first pulse PW1.

The timing control part 201 generates the first gate clock signal CPV1and the second gate signal CPV2 having a third horizontal period H3being equal to or less than the first horizontal period H1 during thethird period or the sixth period T3 or T6. The first and second gateclock signals CPV1 and CPV2 are substantially the same signal. Each ofthe first and second gate clock signals CPV1 and CPV2 includes a highperiod having a high level and a low period having a low level. The highperiod and the low period may be substantially the same as each other.

In an embodiment, the gate driving part 530 outputs the odd-numberedgate signals G1, G3, . . . , based on the first gate clock signal CPV1and outputs the even-numbered gate signals G2, G4 . . . , based on thesecond gate clock signal CPV2.

The first and second gate clock signals CPV1 and CPV2 are substantiallythe same as each other, so that the odd-numbered gate signal G1 and theeven-numbered gate signal G2 adjacent the odd-numbered gate signal G1are substantially the same as each other. Two gate lines receiving thesame gate signals are activated at the same time.

A frame period activated during the first to m-th gate signals G1, G2, .. . , Gm of the display panel 400 may be decreased by about ½ ascompared with a frame period shown in FIG. 5A.

Therefore, during the third or sixth period T3 or T6 less than the firstor fourth period T1 or T4, the black data voltage may be provided to thedisplay panel 400.

In an exemplary embodiment, the period during which the black datavoltage is provided to the display panel 400 may be decreased by about ½as compared with a period during which the data voltage of the left-eyedata frame or the right-eye data frame is provided to the display panel400, but is not limited thereto. For example, when the same gate signalis provided to three gate lines adjacent each other, in the periodduring which the black data voltage is provided to the display panel400, the black data voltage may be decreased by about ⅓, and when thesame gate signal is provided to four gate lines adjacent each other, inthe period during which the black data voltage is provided to thedisplay panel, the black data voltage may be decreased by about ¼.

FIG. 7 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention. FIG. 8 is a waveform diagram illustrating a method of drivingthe display panel of FIG. 7 according to an exemplary embodiment of thepresent invention.

Referring to FIGS. 2 and 7, the method of driving the display panelaccording to an exemplary embodiment includes a method of driving with aforward direction scan mode and a reverse direction scan modealternately.

The timing control part 200 controls the panel driving part 500 to drivethe display panel 400 with the forward direction scan mode. The paneldriving part 500 displays an M-th left-eye data frame LM and an M-thright-eye data frame RM corresponding to an M-th source image data(e.g., M is a natural number) on the display panel 400 according to thescanning direction of the forward direction.

The data driving part 510 sequentially outputs a data voltage of theM-th left-eye data frame LM and the M-th right-eye data frame RM from afirst horizontal line to an m-th horizontal line according to thescanning direction of the forward direction. The gate driving part 530sequentially outputs gate signals from the first gate signal G1corresponding to a first gate line to the m-th gate line Gm as describedin FIGS. 5A, 5B and 6.

Therefore, the M-th left-eye data frame LM is provided to the displaypanel 400 during a period defined by the first slope line TL1 and thesecond slope line TL2, and the black data voltage is provided to thedisplay panel 400 during a period defined by the second slope line TL2and the third slope line TL3. In addition, the M-th right-eye data frameRM is provided to the display panel 400 during a period defined by athird slope line TL3 substantially parallel to the first slope line TL1and a fourth slope line TL4 substantially parallel to the second slopeline TL2, and the black data voltage is provided to the display panel400 during a period defined by the fourth slope line TL4 and a fifthslope line TL5 substantially parallel to the third slope line TL3.

As shown in FIG. 7, the period during which the black data voltage isprovided to the display panel 400 may be increased from the upper areaof the display panel 400 toward the lower area of the display panel 400along the forward direction.

Then, the timing control part 200 controls the panel driving part 500 todrive the display panel 400 with the reverse direction scan mode. Thepanel driving part 500 displays a Q-th left-eye data frame LQ and a Q-thright-eye data frame RQ corresponding to a Q-th source image data (e.g.,Q is a natural number) on the display panel 400 according to thescanning direction of the reverse direction.

The data driving part 510 sequentially outputs a data voltage of theQ-th left-eye data frame LQ and the Q-th right-eye data frame RQ fromthe first horizontal line to the m-th horizontal line according to thescanning direction of the reverse direction. The gate driving part 530sequentially outputs gate signals from the first gate signal G1corresponding to a first gate line to the m-th gate line Gm.

Referring to FIG. 5A, the gate driving part 530 sequentially outputs thegate signal having the first pulse PW1 corresponding to the firsthorizontal period H1 from the m-th gate signal Gm to the first gatesignal G1 along the reverse direction during the period in which thedata voltage of the left-eye and right-eye data frames is provided tothe display panel 400.

Alternatively, referring to FIG. 5B, the gate driving part 530sequentially outputs the gate signal having the second pulse PW2corresponding to the second horizontal period H2 from the m-th gatesignal Gm to the first gate signal G1 along the reverse direction duringthe period in which the black data voltage is provided to the displaypanel 400.

Alternatively, referring to FIG. 6, the gate driving part 530sequentially outputs the gate signal having the third pulse PW3corresponding to the third horizontal period H3 to at least two gatelines adjacent each other along the reverse direction during the periodin which the black data voltage is provided to the display panel 400.

Referring to FIGS. 7 and 8, the first, second, third, fourth, fifth,sixth, seventh and eighth display blocks of the display panel 400 mayhave first, second, third, fourth, fifth, sixth, seventh and eighthdriving waveforms D_DB1, D_DB2, D_DB3, D_DB4, D_DB5, D_DB6, D_DB7 andD_DB8 according to the reverse direction scan mode.

Referring to the first to eighth driving waveforms D_DB1, D_DB2, D_DB3,D_DB4, DDB5, D_DB6, D_DB7 and D_DB8, the data voltage of the left-eyedata frame L is sequentially provided to the eighth display block to thefirst display block during the first period T1. When a first positiveslope line TL1 has a positive first slope angle, the data voltage of theleft-eye data frame L may be provided to the display blocks of thedisplay panel 400 at timings arranged along a first negative slope line−TL1 having a first negative slope angle.

During the second period T2, the data driving part 510 does not providethe data voltage to the display panel 400. For example, the data voltagemay be blocked from application to data lines of the display panel 400by deactivating the gate signals. Thus, the eighth to first displayblocks maintain the data voltage of the left-eye data frame providedduring the first period T1. As shown in FIG. 8, the eighth to firstdisplay blocks have eighth to first holding periods h8, h7, . . . , h1which are gradually decreased along the scanning direction of thereverse direction.

During the third period T3, the black data voltage B is sequentiallyprovided to the eighth to first display blocks. When a second positiveslope line TL2 has a positive first slope angle, the black data voltagemay be provided to the display blocks of the display panel 400 attimings arranged along a second negative slope line −TL2 having a secondnegative slope angle.

For example, the eighth holding period h8 is substantially the same asthe second period T2, the seventh holding period h7 is less than theeighth holding period h8, the sixth holding period h6 is less than theseventh holding period h7, the fifth holding period h5 is less than thesixth holding period h6, the fourth holding period h4 is less than thefifth holding period h5, the third holding period h3 is less than thefourth holding period h4, the second holding period h2 is less than thethird holding period h3, and the first holding period h1 is less thanthe second holding period h2.

The eighth to first holding periods h8, h7, . . . , h1 are includedwithin the image period ON of the light source driving signal LDS. Thus,a luminance of the 3D image may be increased by the eighth to firstholding periods h8, h7, . . . , h1 included within the image period ON.

Then, during the fourth period T4, the data voltage of the right-eyedata frame R is sequentially provided to the eighth display block to thefirst display block. The data voltage of the right-eye data frame R maybe provided to the display blocks of the display panel 400 at timingsarranged along a third negative slope line −TL3 substantially parallelto the first negative slope line −TL1.

During the fifth period T5, the data driving part 510 does not providethe data voltage to the display panel 400. For example, the data voltagemay be blocked from application to data lines of the display panel 400by deactivating the gate signals. Thus, the eighth to first displayblocks maintain the data voltage of the left-eye data frame providedduring the fourth period T4.

During the sixth period T6, the black data voltage B is sequentiallyprovided to the eighth to first display blocks. The black data voltagemay be provided to the display blocks of the display panel 400 attimings arranged along a fourth negative slope line −TL4 substantiallyparallel to the second negative slope line −TL2.

Therefore, the Q-th left-eye data frame LQ is provided to the displaypanel 400 during a period defined by the first negative slope line −TL1and the second negative slope line −TL2, and the black data voltage isprovided to the display panel 400 during a period defined by thenegative second slope line −TL2 and the third negative slope line −TL3.In addition, the Q-th right-eye data frame RQ is provided to the displaypanel 400 during a period defined by a third negative slope line −TL3and a fourth negative slope line −TL4, and the black data voltage isprovided to the display panel 400 during a period defined by the fourthnegative slope line −TL4 and a fifth negative slope line −TL5.

The period B during which the black data voltage is provided to thedisplay panel 400 in the forward direction scan mode and the period Bduring which the black data voltage is provided to the display panel 400in the reverse direction scan mode, may each have a bottom-top symmetricstructure. For example, the period B during which the black data voltageis provided to the display panel 400 in the forward direction scan modemay be gradually increased along the forward direction, and the period Bduring which the black data voltage is provided to the display panel 400in the reverse direction scan mode may be gradually decreased along thereverse direction.

Therefore, the black grayscale difference between the upper, middle andlower areas of the frame image in the forward direction scan mode andthe black grayscale difference between the upper, middle and lower areasof the frame image in the reverse direction scan mode, may be offsetwith each other, so that the black grayscale difference of the frameimage may be removed.

According to an exemplary embodiment of the invention, the display panel400 is alternately driven with the forward direction scan mode and thereverse direction scan mode, so that the data correcting part describedpreviously may be omitted and the black grayscale difference of theframe image may be removed.

According to an exemplary embodiment of the invention, the data voltageis not provided to the display panel during a predetermined period andthe data voltage provided previously is maintained, so that theluminance of the 3D image may be increased. In addition, the black frameimage is inserted between the left-eye frame image and the right-eyeframe image, so that the crosstalk of the 3D image may be reduced orprevented.

FIG. 9 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention.

Referring to FIGS. 1 and 9, the first, second, third, fourth, fifth,sixth, seventh and eighth display blocks of the display panel 400 mayhave first, second, third, fourth, fifth, sixth, seventh and eighthdriving waveforms D_DB1, D_DB2, D_DB3, D_DB4, D_DB5, D_DB6, D_DB7 andD_DB8 according to the forward direction scan mode.

Referring to the first to eighth driving waveforms D_DB1, D_DB2, D_DB3,D_DB4, D_DB5, D_DB6, D_DB7 and D_DB8, the data voltage of the left-eyedata frame L is sequentially provided to the first display block to theeighth display block during the first period T1. The data voltage of theleft-eye data frame L may be provided to the display blocks of thedisplay panel 400 at timings arranged along a first slope line TL1having the first positive slope angle.

During the second period T2, the data driving part 510 does not providethe data voltage to the display panel 400. For example, the data voltagemay be blocked from application to data lines of the display panel 400by deactivating the gate signals. In an exemplary embodiment, the secondperiod T2 is the substantially same as a period during which the datavoltage of the left-eye data frame L is provided to the first displayblock to the eighth display block. For example, the second period T2 isthe substantially same as the first period T1.

During the third period T3, the black data voltage B is provided to thefirst to eighth display blocks at the same time. The third period T3 maybe equal to or more than a horizontal period during which one horizontalline of the display panel 400 is driven. For example, during the thirdperiod T3, the data driving part 510 outputs the black data voltage tothe display panel 400 and the gate driving part 530 outputs the gatesignal having the same pulse to the first to m-th gate lines of thedisplay panel 400 at the same time. Thus, the black data voltage may beprovided to the display blocks of the display panel 400 at the same timeduring the third period T3. The black data voltage is provided to thedisplay panel 400 at timings arranged along the second slope line TL2which is substantially vertical.

Before the black data voltage is provided to the display panel 400 atthe same time, the data voltage is not provided to the display panel 400during the second period T2. Thus, the first to eighth display blockshave first to eighth holding periods h1, h2, . . . , h8 which aregradually decreased along the forward direction. Then, the black datavoltage is provided to the first to eighth display blocks of the displaypanel 400 at the same time during the third period T3.

The first to eighth holding periods h1, h2, . . . , h8 are includedwithin the image period ON of the light source driving signal LDS, sothat the luminance of the upper area UA may be increased. Therefore, theluminance of the left-eye frame image corresponding to the left-eye datamay be increased.

In addition, the data voltage of the right-eye data frame R issequentially provided to the first display block to the eighth displayblock during the fourth period T4. The data voltage of the right-eyedata frame R may be provided to the display blocks of the display panel400 at timings arranged along a third slope line TL3 having the firstpositive slope angle.

During the fifth period T5, the data driving part 510 does not providethe data voltage to the display panel 400. In an exemplary embodiment,the fifth period T5 is substantially the same as a period during whichthe data voltage of the right-eye data frame R is provided to the firstdisplay block to the eighth display block.

During the sixth period T6, the black data voltage B is provided to thefirst to eighth display blocks at the same time. The sixth period T6 maybe equal to or more than a horizontal period during which one horizontalline of the display panel 400 is driven. For example, during the sixthperiod T6, the data driving part 510 outputs the black data voltage tothe display panel 400 and the gate driving part 530 outputs the gatesignal having the same pulse to the first to m-th gate lines of thedisplay panel 400 at the same time. Thus, the black data voltage may beprovided to the display blocks of the display panel 400 at the same timeduring the sixth period T6. The black data voltage is provided to thedisplay panel 400 at timings arranged along the fourth slope line TL4which is substantially vertical.

Before the black data voltage is provided to the display panel 400 atthe same time, the data voltage is not provided to the display panel 400during the fifth period T5. Thus, the first to eighth display blockshave first to eighth holding periods h1, h2, . . . , h8 which aregradually decreased along the forward direction. Then, the black datavoltage is provided to the first to eighth display blocks of the displaypanel 400 at the same time during the sixth period T6.

The first to eighth holding periods h1, h2, . . . , h8 are includedwithin the image period ON of the light source driving signal LDS, sothat the luminance of the right-eye frame image corresponding to theright-eye data may be increased.

According to the second slope line TL2 corresponding to the timings atwhich the black data voltage is provided to the display panel 400 andthe third slope line TL3 corresponding to the timings at which the datavoltage of the right-eye data frame is provided to the display panel400, the period during which the black data voltage is provided to thedisplay panel 400 is gradually increased from the first display block tothe eighth display block. Therefore, the display panel 400 displays agradually changing black image.

The gradually changing black image has black-grayscale differencesbetween the upper area UA, middle area MA and the lower area LA of thedisplay panel 400. Thus, the gradually changing black image is insertedbetween the left-eye frame image and the right-eye frame image, so thatthe left-eye frame image and the right-eye frame image may have thegrayscale differences.

According an exemplary embodiment, the timing control part 200 mayinclude the data correcting part 210 which corrects the grayscaledifferences between the upper area UA, middle area MA and the lower areaLA included in the left-eye and right-eye frame images, as described inFIG. 4.

According to an exemplary embodiment, the data voltage is not providedto the display panel during a predetermined period and the data voltageprovided previously is maintained, so that the luminance of the 3D imagemay be increased. In addition, the black frame image is inserted betweenthe left-eye frame image and the right-eye frame image, so that thecrosstalk of the 3D image may be reduced or prevented.

FIG. 10 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention. FIG. 11 is a waveform diagram illustrating a method ofdriving the display panel of FIG. 10.

Referring to FIGS. 10 and 11, the method of driving the display panelaccording to an exemplary embodiment includes a method of alternativelydriving a forward direction scan mode and a reverse direction scan mode.

The timing control part 200 controls the panel driving part 500 to drivethe display panel 400 with the forward direction scan mode. The paneldriving part 500 displays an M-th left-eye data frame LM and an M-thright-eye data frame RM corresponding to an M-th source image data(e.g., M is a natural number) on the display panel 400 according to thescanning direction of the forward direction.

The M-th left-eye data frame LM is provided to the display panel 400during a period defined by the first slope line TL1 and the second slopeline TL2, and the black data voltage is provided to the display panel400 during a period defined by the second slope line TL2 and the thirdslope line TL3. In addition, the M-th right-eye data frame RM isprovided to the display panel 400 during a period defined by a thirdslope line TL3 substantially parallel to the first slope line TL1 and afourth slope line TL4 substantially parallel to the second slope lineTL2, and the black data voltage is provided to the display panel 400during a period defined by the fourth slope line TL4 and a fifth slopeline TL5 substantially parallel to the third slope line TL3.

As shown in FIG. 10, the period during which the black data voltage B isprovided to the display panel 400 may be increased from the upper areaof the display panel 400 toward the lower area of the display panel 400along the forward direction.

Then, the timing control part 200 controls the panel driving part 500 todrive the display panel 400 with the reverse direction scan mode. Thepanel driving part 500 displays a Q-th left-eye data frame LQ and a Q-thright-eye data frame RQ corresponding to a Q-th source image data (e.g.,Q is a natural number) on the display panel 400 according to thescanning direction of the reverse direction.

Referring to the first to eighth driving waveforms D_DB1, D_DB2, D_DB3,D_DB4, D_DB5, D_DB6, D_DB7 and D_DB8 shown in FIG. 11, the data voltageof the left-eye data frame L is sequentially provided to the eighthdisplay block to the first display block during the first period T1. Thedata voltage of the left-eye data frame L may be provided to the displayblocks of the display panel 400 at timings arranged along a firstnegative slope line −TL1 having a first negative slope angle.

During the second period T2, the data driving part 510 does not providethe data voltage to the display panel 400. In an exemplary embodiment,the second period T2 is substantially the same as a period during whichthe data voltage of the left-eye data frame L is provided to the firstdisplay block to the eighth display block. For example, the secondperiod T2 is substantially the same as the first period T1.

During the third period T3, the black data voltage B is provided to thefirst through eighth display blocks at the same time. The black datavoltage may be provided to the display panel 400 at timings arrangedalong the second slope line TL2 which is substantially vertical. Forexample, the third period T3 may be equal to or more than a horizontalperiod during which one horizontal line of the display panel 400 isdriven.

During the fourth period T4, the data voltage of the right-eye dataframe R is sequentially provided to the eighth display block to thefirst display block. The data voltage of the right-eye data frame R maybe provided to the display blocks of the display panel 400 at timingsarranged along a third negative slope line −TL3.

During the fifth period T5, the data driving part 510 does not providethe data voltage to the display panel 400. In an exemplary embodiment,the second period T2 is substantially the same as a period during whichthe data voltage of the right-eye data frame R is provided to the firstdisplay block to the eighth display block. For example, the fifth periodT5 is substantially the same as the fourth period T4.

During the sixth period T6, the black data voltage B is provided to thefirst to the eighth display blocks at the same time. The black datavoltage may be provided to the display panel 400 at timings arrangedalong the fourth slope line TL4 which is substantially vertical. Forexample, the sixth period T6 may be equal to or more than a horizontalperiod during which one horizontal line of the display panel 400 isdriven.

Referring to FIGS. 10 and 11, according to the reverse direction scanmode, the Q-th left-eye data frame LQ is provided to the display panel400 during a period defined by the first negative slope line −TL1 andthe second slope line TL2 such as the vertical line, and the black datavoltage is provided to the display panel 400 during a period defined bythe second slope line TL2 and the third negative slope line −TL3. Inaddition, the Q-th right-eye data frame RQ is provided to the displaypanel 400 during a period defined by a third negative slope line −TL3and a fourth slope line TL4 which is substantially vertical, and theblack data voltage is provided to the display panel 400 during a perioddefined by the fourth slope line TL4 and a fifth negative slope line−TL5.

The period B during which the black data voltage is provided to thedisplay panel 400 in the forward direction scan mode and the period Bduring which the black data voltage is provided to the display panel 400in the reverse direction scan mode, each has a bottom-top symmetricalstructure. For example, the period B during which the black data voltageis provided to the display panel 400 in the forward direction scan modemay be gradually increased along the forward direction and the period Bduring which the black data voltage is provided to the display panel 400in the reverse direction scan mode may be gradually decreased along thereverse direction.

Therefore, the black grayscale difference between the upper, middle andlower areas of the frame image in the forward direction scan mode andthe black grayscale difference between the upper, middle and lower areasof the frame image in the reverse direction scan mode, may be offsetwith each other, so that the black grayscale difference may be removed.

According to an exemplary embodiment, the display panel 400 isalternatively driven with the forward direction scan mode and thereverse direction scan mode, so that the data correcting part describedpreviously may be omitted and the black grayscale difference of theframe image may be removed.

According to an exemplary embodiment, the data voltage is not providedto the display panel during a predetermined period and the data voltageprovided previously is maintained, so that the luminance of the 3D imagemay be increased. In addition, the black frame image is inserted betweenthe left-eye frame image and the right-eye frame image, so that thecrosstalk of the 3D image may be reduced or prevented.

FIG. 12 is a waveform diagram illustrating a method of driving a displaypanel according to an exemplary embodiment of the present invention.

Referring to FIGS. 1 and 12, according to an exemplary embodiment, thepanel driving part 500 sequentially outputs at least two first andsecond left-eye data frames L1 and L2 and at least two first and secondright-eye data frames R1 and R2 received from the repeating part 300.The second left-eye data frame L2 may be substantially the same as thefirst left-eye data frame L1 and may be generated using the firstleft-eye data frame L1. The second right-eye data frame R2 may besubstantially the same as the first right-eye data frame R1 and may begenerated using the first right-eye data frame R1. Based on the dataenable signal DE, the data driving part 510 outputs the data voltage offirst left-eye data frame L1 to the display panel 400 during the firstperiod T1, blocks the data voltage from being provided to the displaypanel 400 during the second period T2, and outputs the data voltage ofthe second left-eye data frame L2 to the display panel 400 during thethird period T3. In addition, the data driving part 510 outputs the datavoltage of first right-eye data frame R1 to the display panel 400 duringthe fourth period T4, blocks the data voltage from being provided to thedisplay panel 400 during the fifth period T5, and outputs the datavoltage of the second right-eye data frame R2 to the display panel 400during the sixth period T6.

In an embodiment, the gate driving part 530 outputs the gate signal tothe display panel 400 based on the vertical starting signal STV and thegate clock signal CPV. The vertical starting signal STV controls a startof driving the gate driving part 530. Thus, the vertical starting signalSTV has a pulse at a beginning of each of the first period T1, the thirdperiod T3, the fourth period T4 and the sixth period T6 during which thedata enable signal DE is activated. In an embodiment, the gate clocksignal CPV controls a pulse period of each of the first to m-th gatesignals. Thus, the gate clock signal CPV has a first horizontal periodduring the first and fourth periods T1 and T4 during which the datavoltage of the first left-eye data frame or the first right-eye dataframe is provided to the display panel 400, and has a second horizontalperiod different from the first horizontal period during the third andsixth periods T3 and T6 during which the data voltage of the secondleft-eye data frame or the second right-eye data frame is provided tothe display panel 400.

In an embodiment, based on the vertical starting signal STV and the gateclock signal CPV, the gate driving part 530 sequentially outputs thefirst to m-th gate signals to the display panel 400 during the firstperiod T1, blocks the first to m-th gate signals from being output tothe display panel during the second period T2, and sequentially outputsthe first to m-th gate signals to the display panel 400 during the thirdperiod T3. In addition, the gate driving part 530 sequentially outputsthe first to m-th gate signals to the display panel 400 during fourthperiod T4, blocks the first to m-th gate signals from being output tothe display panel 400 during the fifth period T5, and sequentiallyoutputs the first to m-th gate signals to the display panel 400 duringthe sixth period T6.

In an embodiment, the first period T1 is greater than the third periodT3 and is substantially the same as a sum of the second period T2 andthe third period T3. The second period T2 may be substantially the sameas the third period T3. In an embodiment, the fourth period T4 isgreater than the sixth period T6 and is substantially the same as a sumof the fifth period T5 and the sixth period T6. The fifth period T5 maybe substantially the same as the sixth period T6.

According to the control of the timing control part 200, the lightsource driving part 700 generates the light source driving signal LDS.In an embodiment, the light source driving signal LDS has a high levelduring an image period ON during which the light is generated and a lowlevel during a black period OFF during which the light is blocked.According to the first to eighth driving waveforms D_DB1, . . . , D_DB8of the first to eighth display blocks included in the display panel 400,the image period ON of the light source driving signal LDS correspondsto a period during which the display panel displays the left-eye frameimage or the right-eye frame image, and the black period OFF of thelight source driving signal LDS corresponds to a period during which thedisplay panel displays a mixed image, which is a mixture of the left-eyeframe image and the right-eye frame image.

Referring to the first to eighth driving waveforms D_DB1, D_DB2, D_DB3,D_DB4, D_DB5, D_DB6, D_DB7 and D_DB8, during the first period T1, thedata voltage of the first left-eye data frame L1 is sequentiallyprovided to the first to eighth display blocks. Timings at which thedata voltage of the first left-eye data frame L1 is provided to thefirst to eighth display blocks, may be arranged along a first slope lineTL1 having a first slope angle. During the second period T2, the datadriving part 510 does not provide the data voltage to the first toeighth display blocks of the display panel 400. Thus, the first toeighth display blocks maintain the data voltage of the first left-eyedata frame L1 provided during the first period T1.

During the third period T3, the data voltage of the second left-eye dataframe L2 is sequentially provided to the first to eighth display blocks.Timings at which the black data voltage is provided to the first toeighth display blocks, may be arranged along a second slope line TL2having a second slope angle different from the first slope angle.

In addition, during the fourth period T4, the data voltage of the firstright-eye data frame R1 is sequentially provided to the first to eighthdisplay blocks. Timings at which the data voltage of the first right-eyedata frame is provided to the first to eighth display blocks, may bearranged along a third slope line TL3 having the first slope angle.

During the fifth period T5, the data driving part 510 does not providethe data voltage to the first to eighth display blocks. Thus, the firstto eighth display blocks maintain the data voltage of the firstright-eye data frame R2 provided during the fourth period T4.

During the sixth period T6, the data voltage of the second right-eyedata frame R2 is sequentially provided to the first to eighth displayblocks. Timings at which the black data voltage is provided to the firstto eighth display blocks, may be arranged along a fourth slope line TL4having the second slope angle.

Based on the first to eighth driving waveforms D_DB1, . . . , D_DB8 ofthe display panel 400, the light source driving signal LDS has a highlevel during the image period ON during which the display panel 400displays the left-eye frame image or the right-eye frame image. Inaddition, the light source driving signal LDS has a low level during theblack period OFF during which the display panel displays the mixed imagein which the left-eye frame image and the right-eye frame image aremixed.

Thus, the light source part 600 provides the light to the display panel400 during the period in which the display panel 400 displays theleft-eye frame image or the right-eye frame image. The light source part600 blocks the light from being provided to the display panel 400 duringthe period in which the display panel 400 displays the mixed image, sothat the crosstalk of the 3D image may be reduced or prevented.

FIG. 13 is a conceptual diagram illustrating a method of driving adisplay panel according to an exemplary embodiment of the presentinvention.

Referring to FIG. 13, a first left-eye period during which the datavoltage of the first left-eye data frame L1 is provided to the displaypanel 400 may be different from a second left-eye period during whichthe data voltage of the second left-eye data frame L2 is provided to thedisplay panel 400. The first left-eye period may be greater than thesecond left-eye period. In addition, a first right-eye period duringwhich the data voltage of the first right-eye data frame R1 is providedto the display panel 400 may be different from a second right-eye periodduring which the data voltage of the second right-eye data frame R2 isprovided to the display panel 400. The first right-eye period may belonger than the second right-eye period. In an embodiment, the displaypanel 400 receives the data voltages of the first left-eye data frameL1, the second left-eye data frame L2, the first right-eye data frame R1and the second right-eye data frame R2, so that shapes of holdingperiods during which the data voltages L1, L2, R1, and R2 are maintainedin the display panel 400 are substantially the same as shown in FIG. 13.

Referring to FIG. 13, holding periods respectively corresponding to thedata voltages of the first left-eye data frame L1 and the firstright-eye data frames R1 may be gradually decreased from the upper areaof the display panel 400 toward the lower area of the display panel 400.As shown in FIG. 13, a holding period corresponding to a firsthorizontal line 1st LINE of the display panel 400 may be the longest anda holding period corresponding to a last horizontal line M-th LINE ofthe display panel 400 may be the shortest.

In addition, holding periods respectively corresponding to the datavoltages of the second left-eye data frame L2 and the second right-eyedata frames R2 may be gradually increased from the upper area of thedisplay panel 400 toward the lower area of the display panel 400. Asshown in FIG. 13, a holding period corresponding to a first horizontalline 1st LINE of the display panel 400 may be the shortest and a holdingperiod corresponding to a last horizontal line M-th LINE of the displaypanel 400 may be the longest.

The data voltage of the second left-eye data frame L2 may besubstantially the same as the data voltage of the first left-eye dataframe L1, or may be generated using the first left-eye data frame L1.

In addition, the data voltage of the second right-eye data frame R2 maybe substantially the same as the data voltage of the first right-eyedata frame R1, or may be generated using the first right-eye data frameR1.

According to an exemplary embodiment, the data voltage is not providedto the display panel during a predetermined period and the data voltageprovided previously is maintained, so that the luminance of the 3D imagemay be increased. In addition, the data voltage of the 3D image data isblocked from the display panel 400 during the predetermined period, sothat power consumption may be decreased.

Although not shown in the figures, the data voltage of the left-eye dataframe may be provided to the display panel 400 during a K-th frame(e.g., K is a natural number), the data voltage may be blocked from thedisplay panel 400 during a (K+1)-th frame, the data voltage of theright-eye data frame may be provided to the display panel 400 during a(K+2)-th frame and the data voltage may be blocked from the displaypanel 400 during a (K+3)-th frame. In this example, the data voltage maybe blocked from the display panel 400 during two frames, so that thepower consumption may be decreased.

The foregoing is illustrative of the present invention and is not to beconstrued as limiting thereof. Although exemplary embodiments of thepresent invention have been described, many modifications can be made inthe exemplary embodiments without departing from the present invention.Accordingly, all such modifications are intended to be included withinthe scope of the present invention.

What is claimed is:
 1. A display apparatus comprising: a display panel;and a data driving part configured to output a data voltage of athree-dimensional (“3D”) image to the display panel along a scanningdirection of a first direction and output a data voltage of alow-grayscale image to the display panel, wherein a duration ofdisplaying the low-grayscale image on the display panel increases alongthe scanning direction.
 2. The display apparatus of claim 1, wherein aduration of displaying the 3D image on the display panel decreases alongthe scanning direction.
 3. The display apparatus of claim 1, wherein thedata driving part is configured to output the data voltage of the 3Dimage to the display panel during a first period and output the datavoltage of the low-grayscale image to the display panel during a secondperiod equal to or less than the first period.
 4. The display apparatusof claim 3, wherein the 3D image comprises a left-eye image and aright-eye image, the data driving part is configured to output a datavoltage of the left-eye image to the display panel during the firstperiod for the left-eye image, output a data voltage of thelow-grayscale image to the display panel during the second period forthe left-eye image, output a data voltage of the right-eye image to thedisplay panel during the first period for the right-eye image, andoutput a data voltage of the low-grayscale image to the display panelduring the second period for the right-eye image, and a sum of the firstand second periods for the left-eye image is equal to a sum of the firstand second periods for the right-eye image.
 5. The display apparatus ofclaim 3, wherein the data driving part is configured to output the datavoltage of the 3D image to the display panel along a scanning directionof a second direction opposite to the first direction during a fourthperiod, and output the data voltage of the low-grayscale image to thedisplay panel during a fifth period equal to or less than the fourthperiod.
 6. The display apparatus of claim 3, further comprises: a gatedriving part configured to output a gate signal having a first pulse toa gate line of the display panel along the scanning direction during thefirst period.
 7. The display apparatus of claim 6, wherein the gatedriving part is configured to output a gate signal having a second pulsewith a duration less than the first pulse to at least two adjacent gatelines of the display panel during the second period.
 8. The displayapparatus of claim 6, wherein the gate driving part is configured toconcurrently output the gate signal having the first pulse to all gatelines of the display panel during the second period.
 9. The displayapparatus of claim 1, further comprises: a light source part configuredto provide a light to the display panel during a 3D period during whichthe 3D image is displayed on the display panel, and block the light fromthe display panel during a low-grayscale period during which thelow-grayscale image is displayed on the display panel, wherein the 3Dperiod is equal to or more than the low-grayscale period.
 10. Thedisplay apparatus of claim 1, further comprising: a data correcting partconfigured to correct data of the 3D image using a plurality of look-uptables preset corresponding to a plurality of distinct regions of thedisplay panel arranged along the scanning direction.
 11. A method ofdriving a display panel comprising: outputting a data voltage of athree-dimensional (“3D”) image to a display panel along a scanningdirection of a first direction; and outputting a data voltage of alow-grayscale image to the display panel, wherein a duration ofdisplaying the low-grayscale image on the display panel increases alongthe scanning direction.
 12. The method of claim 11, wherein a durationof displaying the 3D image on the display panel decreases along thescanning direction.
 13. The method of claim 11, wherein the data voltageof the 3D image is outputted to the display panel during a first period,and the data voltage of the low-grayscale image is outputted to thedisplay panel during a second period equal to or less than the firstperiod.
 14. The method of claim 13, further comprises: outputting a datavoltage of a left-eye image to the display panel during the first periodfor the left-eye image; outputting a data voltage of the low-grayscaleimage to the display panel during the second period for the left-eyeimage; outputting a data voltage of a right-eye image to the displaypanel during the first period for the right-eye image; and outputting adata voltage of the low-grayscale image to the display panel during thesecond period for the right-eye image, wherein the 3D image comprisesthe left-eye image and the right-eye image, and a sum of the first andsecond periods for the left-eye image is equal to a sum of the first andsecond periods for the right-eye image.
 15. The method of claim 12,further comprises: outputting the data voltage of the 3D image to thedisplay panel along a scanning direction of a second direction oppositeto the first direction during a fourth period; and outputting the datavoltage of the low-grayscale image to the display panel during a fifthperiod equal to or less than the fourth period.
 16. The method of claim13, further comprises: outputting a gate signal having a first pulse toa gate line of the display panel along the scanning direction during thefirst period.
 17. The method of claim 16, further comprises: outputtinga gate signal having a second pulse with a duration less than the firstpulse to at least two adjacent gate lines of the display panel duringthe second period.
 18. The method of claim 16, further comprises:concurrently outputting the gate signal having the first pulse to allgate lines of the display panel during the second period.
 19. The methodof claim 11, further comprises: providing a light to the display panelduring a 3D period during which the 3D image is displayed on the displaypanel, and blocking the light from the display panel during alow-grayscale period during which the low-grayscale image is displayedon the display panel, wherein the 3D period is equal to or more than thelow-grayscale period.
 20. The method of claim 11, further comprising:correcting data of the 3D image using a plurality of look-up tablespreset corresponding to a plurality of distinct regions of the displaypanel arranged along the scanning direction.